Suppresses noise, heat, cold and moisture that can interfere with the comfort and quiet of your motorhome. An excellent lightweight, easy to install insulation for Genset compartments, engine covers/compartments and under carpets or floor mats (does not affect the fit of any component that it is installed under). 3/8" thickness is made up of a dense packing of recycled cloth material, a highly effective Firex fire retardant coating and a spaceage aluminized outer layer. Trim to any shape with household scissors and adhere in place with Sticky Stuff spray adhesive). Seal edges with "Insul-Tape". Conforms to FMVSS safety standard 302. Coast Guard, F.A.A. approved (aircraft grade only). Install with foil side toward source of heat or noise. 30' Insul-Tape